Friday, October 4, 2013

Important Math With Shortcut Solve for Bank Recruitment Exam (Part 5)

1)
A poultry farm has only chickens and pigs. When the manager of the poultry
counted the heads of the stock in the farm, the number totaled up to 200.
However, when the number of legs was counted, the number totaled up to 540. How
many chickens were there in the farm?

6)
The difference between the value of a number increased by 12.5% and the value
of the original number decreased by 25% is 30. What is the original number?

a)60b)40c)80d)120

Correct Answer is (c) 80

Shortcut Solve: 112.5x
X 75x = 30; x (112.5-75) = 30; x = 80

7)
Of the 200 candidates who were interviewed for a position at a call center, 100
had a two-wheeler, 70 had a credit card and 140 had a mobile phone. 40 of them
had both, a two-wheeler and a credit card, 30 had both, a credit card and a
mobile phone and 60 had both, a two wheeler and mobile phone and 10 had all three.
How many candidates had none of the three?

a)0b)20c)10d)18

Correct Answer is (c) 10

Shortcut Solve: 100+70+140-
(40+30+60) +10 = 190 ; so 200-90 = 10

8)
In a class of 40 students, 12 enrolled for both English and German. 22 enrolled
for German. If the students of the class enrolled for at least one of the two
subjects, then how many students enrolled for only English and not German?

9)
In a class 40% of the students enrolled for Math and 70% enrolled for
Economics. If 15% of the students enrolled for both Math and Economics, what %
of the students of the class did not enroll for either of the two subjects?